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A359852 as a simple table

na(n)
221
3504
439648
56930
612669125245488
7471771076278370
832818036405994618064
971577732779401085355729600
10204945946670840805166309694624676331385919836360545974559162291811394735721440

[21,504,39648,6930,12669125245488,471771076278370,
 32818036405994618064,71577732779401085355729600,
 20494594667084080516630969462467633138591983636054\
 5974559162291811394735721440]